您要查找的是不是：
- 共价闭环DNAcovalently closed circular DNA
- 共价闭环 DNAcovalently closed circular DNA; cccDNA
- 共价闭环状DNAcovalently closed circular DNA(CCC DNA)
- 共价闭环(状)DNAcovalent closed circular DNA(cccDNA)
- 共价闭环解旋DNAcovalent closed relaxed DNA
- 共价闭环ＤＮＡcovalently closed circular DNA
- 共价闭环脱氧核糖核酸covalently closed circular DNA
- 共价covalence
- 共用电子对数，共价一个原子与其他原子共用的电子的对数The number of electron pairs an atom can share with other atoms.
- 正常共价normal covalency
- 共价半径covalent radius
- 共价性covalence
- 双共价double covalence
- 共价的covalent
- 共价晶covalent crystal
- 共价式covalent formula
- 共价型intervalencetype
- 共价力covalent force
- 共用电子对数，共价一个原子与其他原子共用的电子的对数。The number of electron pairs an atom can share with other atoms.
- 共价化合covalent combination
